
Don't listen to naysayers
Reading this thread is like reading a flat-Earth society meeting notes.
Genealogy DNA testing has provided amazing tools for genealogists researching their roots and helped bring down many brick walls in their research. These tools are precise and scientifically sound. How else would they have assisted in finding lost relatives and biological families for adoptees?
Unfortunately, to make quick $$$, some companies promoted these tests heavily as a way to get your "ethnicity". Which is neither precise nor very scientific, but potential market for such tools is bigger. Efforts for proper promotion of really useful aspects of consumer DNA testing are left to volunteer bloggers, such like this:
http://genealogysstar.blogspot.com/2019/01/is-genealogical-dna-testing-junk-science.html